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fix(cb-component-comm): check for isFirstChange (#3073)

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* fix(cb-component-comm): check for isFirstChange

* update initial message
This commit is contained in:
Filipe Silva 2017-01-05 12:08:33 +00:00 committed by GitHub
parent aa6f503331
commit aff39d20a9
3 changed files with 9 additions and 5 deletions
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2
public/docs/_examples/cb-component-communication/e2e-spec.ts
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@ -65,7 +65,7 @@ describe('Component Communication Cookbook Tests', function () {
let actual = getActual(); let actual = getActual();
let initialLabel = 'Version 1.23'; let initialLabel = 'Version 1.23';
let initialLog = 'major changed from {} to 1, minor changed from {} to 23'; let initialLog = 'Initial value of major set to 1, Initial value of minor set to 23';
expect(actual.label).toBe(initialLabel); expect(actual.label).toBe(initialLabel);
expect(actual.count).toBe(1); expect(actual.count).toBe(1);

8
public/docs/_examples/cb-component-communication/ts/app/version-child.component.ts
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@ -21,9 +21,13 @@ export class VersionChildComponent implements OnChanges {
let log: string[] = []; let log: string[] = [];
for (let propName in changes) { for (let propName in changes) {
let changedProp = changes[propName]; let changedProp = changes[propName];
let from = JSON.stringify(changedProp.previousValue);
let to = JSON.stringify(changedProp.currentValue); let to = JSON.stringify(changedProp.currentValue);
log.push( `${propName} changed from ${from} to ${to}`); if (changedProp.isFirstChange()) {
log.push(`Initial value of ${propName} set to ${to}`);
} else {
let from = JSON.stringify(changedProp.previousValue);
log.push(`${propName} changed from ${from} to ${to}`);
}
} }
this.changeLog.push(log.join(', ')); this.changeLog.push(log.join(', '));
} }

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public/resources/images/cookbooks/component-communication/parent-to-child-on-changes.gif
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